If you are unsure or concerned about the wear on your tyres you 
can always take your car to a reputable garage for advice.
They may be just as competent teaching learners than a fully qualified instructor, but you need to be aware 
they may not have the experience of one. Regardless if you're 
entirely knew to being behind the wheel or are hoping to gain more confidence in general on the road than what you might be experiencing so far, many 
programs also offer what is known as defensive driving lessons.